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Passively Enhanced High Contrast Bonding

Reflective Losses Experienced without a VBOND Layer

High Brightness Monitors - 19979 VBOND High Contrast, Anti-Reflective Technology Stops Sunlight Washout

Available on VarTech’s 6.4” - 47” LCDs Available on VarTech’s 6.4” - 47” LCDs

With VarTech’s proprietary optical stack technology, VBOND, controlling reflected light significantly improves the optical performance of an LCD display in any ambient lighting condition. This passive enhancement innovation has many unique benefits: Turns a typically bright LCD into a sunlight readable display Does not use any extra power Does not build up extra heat Eliminates the air-gap between the glass and the screen preventing a moisture build up which can cause fogging. Will also prevent dust and dirt from settling in that air-gap Higher structural integrity for more resistance to shock and vibration.

Dramatically Improve Display Performance

Light has the ability to travel through a variety of transparent materials; such as air, glass, plastic, and even water. The material's ability to transmit light is measured by its indices of refraction. As light transfers from one material to another, such as air to glass, the differences of the index of refraction will cause reflection. In the case of an air-to-glass interface, the reflection will be slightly less than 5% of the ambient light. All surfaces that have an index “mismatch” will reflect cumulatively. In the case of a standard glass or plastic protective overlay window, typically used in front of the delicate LCD, there are three surfaces with an index mismatch which will create a total reflection of nearly 15% of the ambient light. The readability of a display is dependant on the amount of light that is being reflected off the display. If the total reflection brightness is close to the displays brightness, the contrast of the display will be reduced to the point where the display's readability is reduced to unacceptable levels. Any VarTech monitor integrated with our VBOND process is equipped with a UV protected solid, transparent bond. VarTech’s unique optical bond eliminates reflection from the two internal layers and utilizes an adhesive that matches the index of refraction of the flat panel and the overlay. As well, the outer surface of the protective window is chemically treated with anti-reflecting coatings which matches the front surface of the glass with the index of refraction of air. This combination reduces the total reflection of the display and front cover glass to less than 2% of the ambient light. A reduction of reflection of this level, all but eliminates reflective loss in most ambient lighting conditions. With reductions of this level, displays with 250 to 450 nits of brightness (cd/m2), traditionally not viewable in direct sunlight, will now be readable in very high ambient brightness or indirect lighting conditions. This method also removes all air gaps, therefore reducing the number of internal reflecting surfaces which can lead to significant degradation of the LCD’s optical performance plus eliminating screen contaminants.

Almost No Reflection with VBOND and AR Coating

Since VarTech supports a number of industrial, marine and military markets there exists a number of add-on choices which can be integrated into the VBOND process to address our customer’s specific environmental needs. These add-on options include: Vandal Shields chemically strengthen the display glass EMI Filters enable LCD compliance with FCC and MIL-STD 461 Touch Screens Transparent thermal heaters to extend LCD operational temperatures

VARTECH

Phone 800.223.8050 | International 001.225.298.0300 | sales@vartechsystems.com | www.vartechsystems.com
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